Akademik Veri Yönetim Sistemi
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.37, sa.2, ss.921-937, 2022 (SCI-Expanded)
© 2022 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.Agglomeration of the bed material is an operational problem seen during the combustion of high alkali content biomasses in fluidized bed combustion systems. In this study, olive cake was used as a biomass because of its high alkali content. Co-combustion of olive cake with Turkish lignites were investigated in order to prevent agglomeration. The combustion tests were conducted in a laboratory scale bubbling fluidized bed combustion system having an inside diameter of 100 mm and a height of 1800 mm. At the end of each test, bottom ashes were subjected to X-ray fluorescence (XRF), Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Electron probe micro-analyzer (EPMA) and X-ray diffraction (XRD) analyses to determine elemental composition and phases of bottom ashes. Co-combustion tests were carried out without any operational problem. Low melting point eutectics were not determined in the bottom ashes. This can be explained by the high sulfur content of the lignites (Tunçbilek: 1.86%, Çan: 5.73%). Combustion of olive cake with high sulfur lignites hindered the formation of Potassium Silicate and subsequently prevented the agglomeration. The potassium element was found in the form of KAlSiO4 in the bottom ash of the olive cake and Çan lignite mixture test..